Question 663190
Let {{{ c }}} = number of calories in the ice cream
{{{ c + 20 }}} = number of calories in the pie
given:
{{{ c + c + 20 = 600 }}}
{{{ 2c = 600 - 20 }}}
{{{ 2c = 580 }}}
{{{ c = 290 }}}
{{{ c + 20 = 310 }}}
There are 290 calories in the ice cream
There are 310 calories in the pie
check:
{{{ 290 + 310 = 600 }}}
{{{ 600 = 600 }}}
OK